He was the leader of his own gang until recruited by the Overmaster and became a member of Cadre. His original Crowbar was destroyed in battle with the Justice League. He lost his replacement crowbar in a card game. He later reclaimed it but soon afterwards was defeated by lightray. He joined up with Dr. Polaris' Cadre that was defeated by the Power Company. He recently tried to escape America along side Black Mass and Nightfall, all three were stopped by Black Lightning.
Crowbar is one of two original surviving members of The Cadre.
Crowbar is a member of Suicide Squad sent in to deal with Vibe and Gypsy. He revealed to Vibe that he has the ability to redirect and absorb energy. However, Vibe was able to reach his crowbar limit and he suddenly disappeared. His current status is unknown but he could just have simply been teleported somewhere else on Earth or to another dimension.
In other media
Crowbar appears in JLU alongside cadre members Black Mass, Fastball and Nightfall. They are defeated by Superman and Batman. He later shows up as a member of Grodd's society.